community of dyers

That's very interesting, Sarah. Thanks for posting about it.

It seems to me that the identity of the orange in LR604 was never made clear before. In fact, while at first I wondered whether there was an orange dye besides the dark navy in LR604, and mentioned in my Remazol dye chart that "some versions might also contain a tiny quantity of an unidentified dye", I then gradually forgot all about it, since the LR604 mixture acted so nicely as though it were a single-color dye instead of a mixture. I've been thinking of LR604 for some time as though it were a single-color unmixed dye, it acted so much like one!

Colour Index reactive orange 107 must be very similar in rates of reaction and molecular weight to reactive black 5, since it didn't give halos or color mottling in LWI when they were mixed.

I wonder whether reactive orange 107 may have become less readily available. With the Procion MX dyes we have seen problems caused by a specific dye's being discontinued by a major manufacturer, forcing our suppliers to reformulate their colors. For example, the manufacturer's mix black MX-CWNA was reformulated by Dharma, and the equivalent ProChem 608 was temporarily replaced by the new mixture 609, when one of its constituents was unavailable for a time; I think that it was brown MX-5BR (reactive brown 10, formerly sold by Jacquard Products as their brown rose, which is now a mixture).

Looking at my page of Remazol dyes, I see that I listed reactive orange 107 as Golden Yellow RNL, which is available from Kraftkolour in Australia (or at least it was). That's not the same name as either of the oranges that ProChem is now selling among their liquid reactive dyes.

I wonder what orange Dylon uses in their Permanent black dye, which contains reactive black 5. (A picture is included in my post "Black Dyes: mixtures and single-color blacks".) It has that same nice neutral black effect, but it's not convenient for your use since it has all the auxiliary chemicals mixed in already for a specific amount of water, and of course it's way more expensive per unit of fiber it can dye since it is prepackaged for a single use.

We'll need to test various orange reactive dyes to see if any of them are free of haloing when used with reactive black 5.

-Paula

Dear Paula and everyone else,

has anyone tried the Black Jacquard vinyl sulphon liquid dye sold by Dharma? Anyone know what its CI number is? It is listed as Black N, but that doesn't mean anything to me. Thanks.

Sarah Jackson
http://jacksonfabricarts.com